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<P>
Interfaces and classes for protein structure (PDB). 
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<p>
See also the <a href="https://github.com/biojava/biojava3-tutorial/blob/master/structure/README.md">BioJava 3 tutorial</a> for more information on the protein structure modules.
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<h2>Parse PDB files</h2>
To load a PDB file see the <a href="io/PDBFileReader.html">PDBFileReader</a> class in the
<a href="io/package-summary.html">IO subpackage</a>.

<h2>Parse mmCif files</h2>
To laod a mmCif file see the <a href="io/MMCIFFileReader.html">MMCIFFileReader</a> class.

<h2>The Structure object</h2>
The <a href="Structure.html">Structure</a> object allows to access the PDB header information as well
as to the data from the ATOM records. The header information is currently available through the following objects:
  <ul>
  <li><a href="PDBHeader.html">PDBHeader</a></li>
  <li><a href="DBRef.html">DBRef</a></li>
  <li><a href="Compound.html">Compound</a></li>
  </ul>

  The structure object provides access to the data from the ATOM records through
  a hierarchy of sub-object:
  <pre>
  <a href="Structure.html">Structure</a>
          |
          <a href="Chain.html">Chain</a>
              |
              <a href="Group.html">Group</a>
                  |
                  <a href="Atom.html">Atom</a>
  </pre>

  Learn more <a href="http://biojava.org/wiki/BioJava:CookBook:PDB:groups">how to work with groups</a>.

 <h2>Other Features</h2>

  <ul>
  <li>Calculate <a href="align/ce/CeMain.html">protein structure alignments with CE and FATCAT.</a></li>
  <li><a href="http://www.spice-3d.org/hibernatePDB/" target="_top">Serialize PDB files to databases using Hibernate</a></li>
  <li><a href="Calc.html">Tools for performing calculations</a>
  <li><a href="gui/BiojavaJmol.html">Display structures in Jmol</a></li>
  </ul>


<p>
  For more documentation on how to work with the Structure API please
  see <a href="http://biojava.org/wiki/BioJava:CookBook#Protein_Structure" target="_top">
  http://biojava.org/wiki/BioJava:CookBook#Protein_Structure</a>
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@since 1.5
